LN之间X电容的问题

atuzai

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xuccmm 发表于 2016-2-24 17:14
% G/ C* L( I/ `4 @! _- n9 `( Q按IT/AV产品标准做的话，没有问题，只要在保险丝后面就OK

如果是灯的呢？有没有这方面的经验或案例

wyq794

不需要安规电容，但是做认证时，一般会控制其电容参数，比如额定电压，容量，温度；
( [5 ]/ F* \1 W举个例子，一般的小夜灯或者非隔离的电源，保险丝之后，很多采用的都是阻容降压方式工作的；直接用一个CBB电容并电阻然后带灯珠，即可正常工作。

nany

可以没有这个容，但是如果有就一定要是安规电容，见24.1.1

ljh809809

A capacitor connected between two line conductors in a PRIMARY CIRCUIT, or between one line
( d9 O6 k# t. b, C6 h8 econductor and the neutral conductor or between the PRIMARY CIRCUIT and protective earth
shall comply with one of the subclasses of IEC 60384-14 and shall be used in accordance
/ ^3 p; B) k7 W! o% Y) ^with its rating. This requirement also applies to a capacitor bridging DOUBLE INSULATION or
REINFORCED INSULATION elsewhere in the equipment. The details of the damp heat, steady
state test as specified in 4.12 of IEC 60384-14 shall be as follows:
* h" h2 i5 _6 q$ U+ Z。。。
5 O4 c: I( ~% V3 W# gRules for the application of Table 1C
* p1 _$ U+ ?. s# n2 {) o( W1 Capacitors used to bridge BASIC INSULATION, SUPPLEMENTARY INSULATION or REINFORCED INSULATION shall be
class Y except that it is permitted to bridge BASIC INSULATION in a SECONDARY CIRCUIT by a class X capacitor.
2 For a single capacitor bridging FUNCTIONAL INSULATION, BASIC INSULATION, SUPPLEMENTARY INSULATION or
" {* `1 R, J9 [, T1 g) NREINFORCED INSULATION, the voltage rating of the single capacitor shall be at least equal to the RMS WORKING
0 W" W! d: w; D" U$ {/ aVOLTAGE across the insulation being bridged, determined according to 2.10.2.2.
这里强调的是L与L之间，L与N之间的绝缘是功能绝缘，而不在于电容前端是否有电阻，所以我个人认为嘴跨接在L与L之间或L与N之间的电容仍然是安规电容，需要符合IEC 60384-14的要求。

9 W; ^2 A: e: E) `0 Q3 F- ]4 S/ W! Z